Study: marijuana can cause infertility in men

As more states legalize marijuana, a new study by a Tulane University researcher has a warning for would-be dads. Smoking weed regularly may harm a man’s fertility.

Researchers from Tulane and the University of Washington found a connection between low semen volume and damaged sperm among men who smoked marijuana. But the side effects weren’t all bad. The study also found that men who smoked marijuana were more likely to have sperm that swam faster.

The findings were published in the journal Therapeutic Advances in Urology.

“This is one of the first studies that show a decline in sperm quality in current and past marijuana smokers, compared to non-smokers,” said Dr. Omer A. Raheem, lead author on the study and assistant professor of urology at Tulane University School of Medicine. “This is significant because it adds to the evolving evidence of the potential negative impacts of marijuana on human reproduction.”

Raheem added, “It’s unclear if the sperm changes that take place due to marijuana use are reversible and if there’s a specific amount of time required to achieve sperm recovery following the discontinuation of marijuana smoking. Much more research and randomized studies are needed to gain a full understanding of the relationship between marijuana and male reproductive health.”

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